Raymarine Chartplotter RL70CRC PLUS, RL80CRC PLUS manual Function of SeaTalk and Nmea Data

SeaTalk® and NMEA In

8-24 hsb2 PLUS Series Color LCD Display

SeaTalk® and NMEA In

The hsb2 series display can receive a comprehensive range of data. The primary data is described below:

Table 8-4:	Function of SeaTalk and NMEA Data
Data	Primary Uses	Suggested Source
Heading	Heading Modes	Autopilot,
	MOB (if Speed data also available)	Compass connected to SeaTalk bus
	Radar/Chart Overlay (chart),	NMEA Compass*
	MARPA (radar)
Position	MOB (also requires speed and HDG	SeaTalk GPS connected via Auxiliary JB
	data)	Existing GPS Navigator via SeaTalk bus
	Radar/Chart Overlay	Existing GPS (or Loran-C) navigator with
	Position data in data box and Nav	NMEA output
	Window
	Waypoints & Marks
	Own vessel position (chart)
	Data Log (chart)
Waypoint	Chart: Waypoint and route transfer	Existing GPS Navigator via SeaTalk bus
		Existing GPS (or Loran-C) navigator with
		NMEA output

*Accurate heading data is required for MARPA and radar/chart overlay, and it must be provided on NMEA. We recommend the Raymarine Rate Gyro Compass or a Raymarine autopilot system incorporating a 150G or 400G Course Computer with internal rate gyro.

Heading data should ideally contain both magnetic and true heading. If only one is available then variation needs to be provided either manually or automatically - see Variation Source on page 7-8.

Some other radars and chartplotters can exchange their cursors via SeaTalk.

Locked heading should be used for Course Up if available via SeaTalk.

Other data connected via a SeaTalk bus or via NMEA is generally displayed in data boxes, e.g. depth, apparent wind angle and speed, time.

Note: The Fishfinder uses its own depth data, rather than any other depth data on SeaTalk. If there is no other depth data on SeaTalk, Fishfinder depth is transmitted. If speed and temperature data are available on SeaTalk the Fish- finder uses this data; if this data is not on SeaTalk from other instruments, it is transmitted by the Fishfinder.

For details of received data refer to the table in Appendix D:SeaTalk and NMEA Data Received and Transmitted. Examples of SeaTalk and NMEA systems are shown in Figure 8-14and Figure 8-15.